Calculate WHIP (Walks plus Hits per Inning Pitched) from walks, hits allowed, and innings pitched. Enter baseball-style innings notation like 6.1 (6β innings) directly.
| WHIP Range | Rating |
|---|---|
| ~ 0.99 | Ace-level (below 1.00) |
| 1.00 - 1.19 | Excellent |
| 1.20 - 1.34 | Average |
| 1.35 - 1.49 | Below Average |
| 1.50 + | Poor |
WHIP (Walks plus Hits per Inning Pitched) measures how many baserunners a pitcher allows per inning via walks and hits. The formula is '(walks + hits allowed) Γ· innings pitched'. For example, allowing 40 walks and 120 hits over 160 innings gives a WHIP of 1.00. A lower WHIP indicates a pitcher who keeps baserunners off the bases more consistently.
Like ERA, WHIP needs the exact innings count to be accurate. 6.1 innings means 6 innings plus 1 out (1/3 inning), and 6.2 innings means 6 innings plus 2 outs (2/3 inning). This calculator's baseball-notation toggle automatically converts .1 and .2 into 1/3 and 2/3 innings so WHIP is computed correctly.
A WHIP below 1.00 is rare and considered ace-level, 1.00-1.19 is excellent, 1.20-1.34 is average, 1.35-1.49 is below average, and 1.50+ is poor. In both KBO and MLB, a season WHIP of 1.10 or lower is achieved only by top-of-the-league pitchers.
WHIP measures how often a pitcher allows baserunners, while ERA measures how many runs actually score. A pitcher with a low WHIP can still post a higher ERA if they struggle in high-leverage moments, while a pitcher who allows more baserunners can keep ERA low through double plays or caught stealing. Looking at both together reveals a pitcher's consistency and situational management.
Lowering WHIP starts with command to reduce walks, which requires precise work at the edges of the strike zone. Inducing ground balls reduces hit-worthy contact, and getting ahead in the count forces hitters into more defensive swings. Pairing pitch sequencing with defensive positioning to lower the batting average on balls in play (BABIP) also helps keep WHIP in check.